update demo panel and CHANGES.md

Author: clarasb

chartlets.js/CHANGES.md

@@ -8,6 +8,8 @@
 
 * Added icon support for `Button`, `IconButton` and `Tabs` components.
  (#124).
+ 
+* Added (MUI) component `Accordion`. (#134)
 
 ## Version 0.1.7 (from 2025/12/03)
 

chartlets.py/CHANGES.md

@@ -2,6 +2,8 @@
 
 * Added `size` and removed `variant` property from `IconButton`
   component to align with component in chartlets.js. (#124)
+  
+* Added (MUI) component `Accordion`. (#134)
 
 ## Version 0.1.7 (from 2025/12/03)
 

chartlets.py/demo/my_extension/my_panel_9.py

@@ -20,11 +20,11 @@
 panel = Panel(__name__, title="Panel I")
 
 
-@panel.layout(State("@app", ))
+# noinspection PyUnusedLocal
+@panel.layout()
 def render_panel(
     ctx: Context,
 ) -> Component:
-
     columns: list[TableColumn] = [
         {"id": "id", "label": "ID", "sortDirection": "desc"},
         {